diff --git a/doc/fsl.utils.assertions.rst b/doc/fsl.utils.assertions.rst
new file mode 100644
index 0000000000000000000000000000000000000000..e3446286418dbad362d675d01f5a73b670b92d9f
--- /dev/null
+++ b/doc/fsl.utils.assertions.rst
@@ -0,0 +1,7 @@
+``fsl.utils.assertions``
+========================
+
+.. automodule:: fsl.utils.assertions
+    :members:
+    :undoc-members:
+    :show-inheritance:
diff --git a/doc/fsl.utils.rst b/doc/fsl.utils.rst
index ce6e4db0a6a1377707b221581a599f4f780057a4..0f65ae3d63c3130cf456aab347a5b7a102cfd606 100644
--- a/doc/fsl.utils.rst
+++ b/doc/fsl.utils.rst
@@ -4,6 +4,7 @@
 .. toctree::
    :hidden:
 
+   fsl.utils.assertions
    fsl.utils.cache
    fsl.utils.callfsl
    fsl.utils.idle